package com.allams.springcloud.filter;

import cn.hutool.db.sql.Order;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;


/**
 * @author Allams
 */
@Component
@Slf4j
public class LogGatewayFilter extends Order implements GlobalFilter, Ordered {

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        log.info("被全局的filter拦截咯");
        String username = exchange.getRequest().getQueryParams().getFirst("username");
        if (username == null) {
            log.info("用户名为空，非法用户");
            exchange.getResponse().setStatusCode(HttpStatus.NOT_ACCEPTABLE);
            return exchange.getResponse().setComplete();
        }
        return chain.filter(exchange);
    }

    @Override
    public int getOrder() {
        return 0; //设置filter拦截顺序，越小越先拦截
    }
}
